EC fans, AC fan speed controllers or damper actuators are often controlled via a 0-10 Volt analogue control signal. Control signals are typically used to control devices remotely. Such control signal can be generated manually via a potentiometer or control switch. Via the potentiometer, fan speed can be set remotely.
0-10 Volt potentiometer Analogue control signals have been popular in the (home) automation industry for many years. Via a simple 0-10 Volt signal, the desired fan speed is transmitted to the EC fan or AC fan speed controller. The 0-10 Volt control signal can be manually generated via a potentiometer (infinitely variable) or via a control switch (in steps). It is a simple technology that works fine if cable lengths remain limited. However, if the control lines are installed nearby power lines, there is a risk of interferences. It is advisable to keep the cable length of the analogue control signal limited to maximum 50 m and to use shielded cables to minimise the risk of interferences.
Control switch for 3-step fan speed control The SMT-D series of control switches are often used to adjust fan speed in 3 steps. Control switches generate a 0-10 Volt signal in 3 steps. They are available with or without OFF position. Their stepped 0-10V signal can be used to control EC fan, AC fan speed controllers, frequency inverters, etc. Position 1 and position 2 can be adjusted via internal trimmers. Position 3 is equal to the supplied voltage – typical 10 VDC. In case there is an off position, this corresponds to 0 VDC.
Potentiometers for variable fan speed control A potentiometer allows you to manually generate an infinitely variable control signal - for example 0-10 Volt. The 0-10 Volt control signal is often used for infinitely variable EC fan speed control. It can also control a frequency inverter, an AC fan speed controller, etc. Some potentiometers generate other analogue control signals, e.g. 0-20 mA or a PWM signal. Potentiometers are available with different supply voltages, with or without off position, etc.
Potentiometer with Modbus RTU communication SPV series are potentiometers with Modbus RTU communication on board. Digital communication (e.g. Modbus RTU communication) offers many advantages. Cable lengths up to 1.000 m are possible. Multiple values can be transmitted in both ways. Not only the desired fan speed can be sent to the motor, also the potentiometer position is available remotely. The potentiometer status can be read out via the Modbus master device or – if connected to SenteraWeb via an internet gateway – remotely via the internet. The potentiometer output value can be set locally or it can be overruled via Modbus RTU communication. This makes it possible to switch the ventilation system in the complete building to high level during a certain period of time by overruling the output values temporarily.
How to guarantee sufficient fresh air supply in existing buildings?Sufficient fresh air supply is not only important for the feeling of well-being and for optimal functioning - it is also essential for your health. In closed indoor spaces, sufficient ventilation is necessary to minimise the risk of spreading the Coronavirus. Providing ventilation in existing buildings is, however, not always easy. Therefore exhaust ventilation can be a good solution in many cases.>>>
Monitor your fresh air supplyHVAC sensors monitor indoor air quality. Based on specific measurements supply and exhaust fan speed is regulated to guarantee sufficient fresh air supply and to optimise the energy efficiency of the ventilation system.>>>
Indoor Air Quality in hospitalsWhy is air quality in hospitals so important? A hospital is a place where both weak and healthy people come into close contact with each other. In Corona times, that is a frightening scenario that requires many precautions to make this possible in safe conditions. Monitoring indoor air quality is one of these precautions.>>>
CO2 monitoring in schoolsSentera CO2 meters help to reduce the spread of the COVID-19 virus in this school in Sint-Niklaas, Belgium. Continuously measuring CO2 concentrations in classrooms provides certainty about indoor air quality. Good indoor air quality is essential to prevent the spread of the COVID-19 virus.>>>
CO2 monitoring system to reduce the risk of COVID-19 contaminationFresh indoor air reduces the risk of COVID-19 contaminations. Sentera HVAC sensors check whether there is sufficient fresh air supply. In addition to the traffic light indication that is standard available on the CO2 sensors, an additional display can be added. The measurements can be visualised via this optional 5-inch touchscreen.>>>
Sentera provides innovative, easy-to-use control solutions for HVAC installations and ventilation systems. How to optimise your comfort, indoor air quality, safety and overall wellbeing? We have the answer!